clear all;
x=[-0.12 -0.80 -0.05 -0.04 -0.01 0.05 0.07 0.21];
y=[-1.50 -0.80 -0.40 -0.10 0.20 0.61 0.82 1.24];
v1=var(x);
v2=var(y);
c1=finv(0.025,7,7);
c2=finv(0.975,7,7);
a4=(v1/v2)/c1;
b4=(v1/v2)/c1;
[a4,b4]
